<template>
    <div class="login_container">
        <div class="login_box">
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>

            <el-form ref="loginFormRef"
            label-width="0px" class="login_form" :model="loginForm" :rules="loginFormRules">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input  prefix-icon="el-icon-search" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input prefix-icon="el-icon-search" v-model="loginForm.password" type="password"></el-input>
                </el-form-item>
                <!-- 按钮 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>
export default {
    data() {
        return {
            // 登录对象的数据绑定
            loginForm:{
                username:"admin",
                password:"123456"
            },
            loginFormRules:{
                username:[
                    {required:true,message:"请输入登录名称",trigger:"blur"},
                    {min:3,max:10,message:"长度在3到10个字符",trigger:"blur"}
                ],
                password:[
                    {required:true,message:"请输入登录密码",trigger:"blur"},
                    {min:6,max:15,message:"长度在6到15个字符",trigger:"blur"}
                ]
            }
        }
    },
    methods: {
        // 点击重置按钮，重置登录表单
        resetLoginForm(){
            this.$refs.loginFormRef.resetFields();
        },
            // 表单预验证
        login(){
            this.$refs.loginFormRef.validate(async valid=>{
                if(!valid) return;
                const {data:res}=await this.$http.post("login",this.loginForm);
                if(res.meta.status!==200) return this.$message.error("登录失败！");
                this.$message.success("登录成功!");

                // 将登录成功之后的token保存到客户端中的sessionStorage
                window.sessionStorage.setItem("token",res.data.token);
                this.$router.push("/home");
            });

        }
    },
   
}
</script>

// style lang="less" scoped 

<style >
.login_container{
    background-color: blue;
    height: 100%;
}
.login_box{
    height: 300px;
    width: 450px;
    background-color: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
}
.avatar_box{
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%,-50%);
    background-color: #fff;
}

.avatar_box img{
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background-color: #eee;
}

.login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box ;
}

.btns{
    display: flex;
    justify-content: flex-end;
}

</style>